Help! N52 shuddering :(

Fb2017 · 05-08-2018, 06:59 PM

Hello everyone, I am pretty desperate, frusterated and fed up with this car. Its a 2011 328xi with the N52N motor. For the last 30 000km the car has had a snall misfire every now and then. I changed the plugs and coils and it made the car 70% better. The problem has started to rear its ugly head again. I put in new oem plugs, more coils and it still shakes. You can actually hear popping from the exhaust when the car is warm. The missing/shaking happens when the car is both cold and hot. It is much more pronounced when at operating temperature though. I have babied this car since day one and have always given it the good stuff. I don’t even know where to look at this point. All help is welcomed.

Car has 120000km on the odometer, zero leaks, absolutely zero trouble codes yet it idles like crap. It has always had 91 gas and gets euro formula castrol oil. The car revs fine but once warm between 800rpm and 1000rpm it shakes and shudders. It has no issues driving, just realllly annoying when stuck at the lights or waiting for someone etc..From what I can tell with the carly app bank 1 is running 5% rich. Someone please point me in the right direction

I’m happy to buy a case of beer to the winning tip haha.. thank you all in advance

Also I should add that I just cleaned the vanos solenoids .. and no change

BashShah · 05-08-2018, 08:34 PM

might need injector cleaning
Vanos cleaning swaping or replacing.
air filter.... but I doubt it if you babied it.

1) go to chevron, fill up with the best for (must be on a nearly empty tank)
the Techron in the fuel will clean your injectors.
2) Check how dirty your Vanos Solenoids are. clean and swap them. look up diy on it.

3) Dont have any experience with N52 engines, but it could be Carbon build up in INTAKE Ports. (walnut blast)
4) what scanner are you using? (might require a dealer diagnostic visit)

Good luck.

Fb2017 · 05-09-2018, 06:06 AM

-I tried the injector cleaning as well, tried a few of them and still no change.
-Vanos solenoids looked fine I cleaned them a few days ago
-N52 is not a direct injection engine thus it doesn’t suffer from carbon build up on the valves.
-used carly for bmw app

If theres any parameters you suggest sharing do let me know! Thank you

labrador · 05-20-2018, 03:44 PM

Might be the eccentric shaft sensor. Google on it.

PichaDis11 · 05-23-2018, 08:43 PM

Quote:

Originally Posted by labrador

Might be the eccentric shaft sensor. Google on it.

Gets my vote as well.

05-08-2018, 06:59 PM	#1
Fb2017 First Lieutenant 40 Rep 345 Posts Drives: bicycle Join Date: Nov 2014 Location: Canada iTrader: (2)	Help! N52 shuddering :( Hello everyone, I am pretty desperate, frusterated and fed up with this car. Its a 2011 328xi with the N52N motor. For the last 30 000km the car has had a snall misfire every now and then. I changed the plugs and coils and it made the car 70% better. The problem has started to rear its ugly head again. I put in new oem plugs, more coils and it still shakes. You can actually hear popping from the exhaust when the car is warm. The missing/shaking happens when the car is both cold and hot. It is much more pronounced when at operating temperature though. I have babied this car since day one and have always given it the good stuff. I don’t even know where to look at this point. All help is welcomed. Car has 120000km on the odometer, zero leaks, absolutely zero trouble codes yet it idles like crap. It has always had 91 gas and gets euro formula castrol oil. The car revs fine but once warm between 800rpm and 1000rpm it shakes and shudders. It has no issues driving, just realllly annoying when stuck at the lights or waiting for someone etc..From what I can tell with the carly app bank 1 is running 5% rich. Someone please point me in the right direction I’m happy to buy a case of beer to the winning tip haha.. thank you all in advance Also I should add that I just cleaned the vanos solenoids .. and no change
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05-08-2018, 08:34 PM	#2
BashShah Colonel 296 Rep 2,015 Posts Drives: 2012 335i Sedan Join Date: Oct 2012 Location: Vancouver, Canada iTrader: (0)	might need injector cleaning Vanos cleaning swaping or replacing. air filter.... but I doubt it if you babied it. 1) go to chevron, fill up with the best for (must be on a nearly empty tank) the Techron in the fuel will clean your injectors. 2) Check how dirty your Vanos Solenoids are. clean and swap them. look up diy on it. 3) Dont have any experience with N52 engines, but it could be Carbon build up in INTAKE Ports. (walnut blast) 4) what scanner are you using? (might require a dealer diagnostic visit) Good luck.
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05-09-2018, 06:06 AM	#3
Fb2017 First Lieutenant 40 Rep 345 Posts Drives: bicycle Join Date: Nov 2014 Location: Canada iTrader: (2)	-I tried the injector cleaning as well, tried a few of them and still no change. -Vanos solenoids looked fine I cleaned them a few days ago -N52 is not a direct injection engine thus it doesn’t suffer from carbon build up on the valves. -used carly for bmw app If theres any parameters you suggest sharing do let me know! Thank you
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05-20-2018, 03:44 PM	#4
labrador Second Lieutenant 65 Rep 218 Posts Drives: E90 Join Date: Mar 2018 Location: California iTrader: (0)	Might be the eccentric shaft sensor. Google on it.
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